([4/7]-[3/14])÷[1/28] | 0.5×2.5×12.5×64 | [4/9 |
1 |
5 |
4 | ||
5] | ||
4-[5/11]-[6/11] | [1/8]×58+42÷8 | 36×([2/3]+[1/6]-[3/4]) |
liuchangyun 幼苗
共回答了13个问题采纳率:84.6% 举报
①([4/7]-[3/14])÷[1/28],
=[4/7]×28-[3/14]×28,
=16-6,
=10;
②0.5×2.5×12.5×64,
=(2.5×8)×(12.5×8)×0.5,
=20×100×0.5,
=1000;
③[4/9]×[1/5]÷[4/5],
=[4/9]×[1/5]×[5/4],
=[1/9];
④4-[5/11]-[6/11],
=4-([5/11]+[6/11]),
=4-1,
=3;
⑤[1/8]×58+42÷8,
=[1/8]×58+42×[1/8],
=(42+58)×[1/8],
=12.5;
⑥36×([2/3]+[1/6]-[3/4]),
=36×[2/3]+36×[1/6]-36×[3/4],
=24+6-27,
=3.
点评:
本题考点: 整数、分数、小数、百分数四则混合运算;运算定律与简便运算.
考点点评: 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
1年前
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